TAKAHASHI Hitoshi

J-GLOBAL         Last updated: Oct 21, 2019 at 17:06
 
Avatar
Name
TAKAHASHI Hitoshi
Affiliation
High Energy Accelerator Research Organization
Job title
Assistant Professor
Degree
Doctor of Science(Kyoto University)

Research Interests

 
 

Research Areas

 
 

Education

 
 
 - 
2002
Graduate School, Division of Natural Science, Kyoto University
 
 
 - 
1996
Faculty of Science, Kyoto University
 

Published Papers

 
K. Miwa, J. K. Ahn, Y. Akazawa, T. Aramaki, S. Ashikaga, S. Callier, N. Chiga, S. W. Choi, H. Ekawa, P. Evtoukhovitch, N. Fujioka, M. Fujita, S. Hasegawa, S. Hayakawa, R. Honda, S. Hoshino, K. Hosomi, M. Ichikawa, Y. Ichikawa, M. Ieiri, M. Ikeda, K. Imai, Y. Ishikawa, S. Ishimoto, W. S. Jung, H. Kanauchi, H. Kanda, B. M. Kang, H. Kawai, S. H. Kim, K. Kobayashi, T. Koike, K. Matsuda, Y. Matsumoto, R. Nagatomi, Y. Nakada, M. Nakagawa, I. Nakamura, T. Nanamura, M. Naruki, S. Ozawa, L. Raux, A. Sakaguchi, H. Sako, S. Sato, T. Shiozaki, K. Shirotori, K. Suzuki, S. Suzuki, M. Tabata, C. D.L. Taille, H. Takahashi, T. Takahashi, T. N. Takahashi, H. Tamura, Z. Tsamalaidze, H. Umetsu, M. Ukai, T. O. Yamamoto, K. Yoshimura
AIP Conference Proceedings   2130    Jul 2019
© 2019 Author(s). The ςp scattering experiment has just been started at J-PARC this year (2018). We made "ς beam factory" a reality where a beam with an intensity of more than 5×105 ς- beam per day could be produced by using 20 M/spill π- beam. Th...
Junya Yoshida, Keizo Agari, Jung Keun Ahn, Takaya Akaishi, Yuya Akazawa, Sakiko Ashikaga, Bernd Bassalleck, Sebastian Bleser, Wonji Choi, Woo Seung Chung, Hiroyuki Ekawa, Yoko Endo, Yuki Fujikawa, Norina Fujioka, Manami Fujita, Ryosuke Goto, Yuncheng Han, Shoichi Hasegawa, Tadashi Hashimoto, Shuhei Hayakawa, Tomonari Hayakawa, Emi Hayata, Kenneth Hicks, Erina Hirose, Masanori Hirose, Ryotaro Honda, Kaoru Hoshino, Suharu Hoshino, Kenji Hosomi, Sang Hoon Hwang, Yudai Ichikawa, Masaya Ichikawa, Masaharu Ieiri, Kenichi Imai, Kento Inaba, Yuji Ishikawa, Abzal Iskendir, Hiroki Ito, Kazuyua Ito, Shunsuke Kanatsuki, Honoka Kanauchi, Ayumi Kasagi, Toshihide Kawai, Min Ho Kim, Shin Hyung Kim, Sung Hyun Kim, Young Jun Kim, Shinji Kinbara, Ryuta Kiuchi, Hidetaka Kobayashi, Kazuya Kobayashi, Takeshi Koike, Ami Koshikawa, Jae Yong Lee, Jong Won Lee, Myeong Jae Lee, Tianli Ma, Shota Matsumoto, Michifumi Minakawa, Koji Miwa, Aung Thu Moe, Tae Jin Moon, Manabu Moritsu, Yuichi Nagase, Yoshiyuki Nakada, Manami Nakagawa, Daisuke Nakashima, Kazuma Nakazawa, Takuya Nanamura, Megumi Naruki, Aung Nay Lin Nyaw, Yu Ogura, Masaki Ohashi, Kenichiro Oue, Shotaro Ozawa, Josef Pochodzalla, Sun Young Ryu, Hiroyuki Sako, Yuki Sasaki, Susumu Sato, Yoshinori Sato, Falk Schupp, Michiko Sekimoto, Koutarou Shiratori, Min Min Soe, Myint Kyaw Soe, Jong Yoon Sohn, Hitoshi Sugimura, Kazuki Suzuki, May Sweet, Hitoshi Takahashi, Toshiyuki Takahashi, Yu Takahashi, Tomoya Takeda, Hirokazu Tamura, Kiyoshi Tanida, Aye Moh Moh Theint, Khin Than Tint, Yuichi Toyama, Mifuyu Ukai
AIP Conference Proceedings   2130    Jul 2019
© 2019 Author(s). J-PARC E07 is the most complex emulsion experiment to date investigating double hypernuclei with a hybrid emulsion method. This experiment aims to detect 104 Ξ- stop events, ten times more events than the past experiments. Thus, ...
Ryotaro Muto, Keizo Agari, Kazuya Aoki, Kotaro Bessho, Masayuki Hagiwara, Erina Hirose, Masaharu Ieiri, Ruri Iwasaki, Yohji Katoh, Jun Ichi Kitagawa, Michifumi Minakawa, Yuhei Morino, Kiwamu Saito, Yoshinori Sato, Shin'Ya Sawada, Yoshihisa Shirakabe, Yoshihiro Suzuki, Hitoshi Takahashi, Kazuhiro Tanaka, Akihisa Toyoda, Hiroaki Watanabe, Yutaka Yamanoi
EPJ Web of Conferences   153    Sep 2017
© The Authors, published by EDP Sciences, 2017. At the Hadron Experimental Facility in J-PARC, we inject a 30-GeV proton beam into a gold target to produce secondary particle beams required for various particle and nuclear physics experiments. The...
K. H. Tanaka, E. Hirose, H. Takahashi, K. Agari, M. Ieiri, Y. Katoh, M. Minakawa, R. Muto, Y. Sato, S. Sawada, M. Takasaki, A. Toyoda, H. Watanabe, Y. Yamanoi, K. Kato, Y. Saitoh, H. Satoh, Y. Satoh, K. Yahata
IEEE Transactions on Applied Superconductivity   26    Jun 2016
© 2016 IEEE. Several species of radiation-resistant magnets were developed for J-PARC, a Japanese brand-new high-intensity accelerator complex, whose maximum beam power reaches 1 MW. The first development was polyimide insulation magnets. The ordi...
Ryotaro Muto, Keizo Agari, Kazuya Aoki, Yoshinori Fukao, Erina Hirose, Masaharu Ieiri, Ruri Iwasaki, Yohji Katoh, Michifumi Minakawa, Yuhei Morino, Kyoichiro Ozawa, Yoshinori Sato, Shin'Ya Sawada, Yoshihisa Shirakabe, Yoshihiro Suzuki, Hitoshi Takahashi, Kazuhiro Tanaka, Akihisa Toyoda, Hiroaki Watanabe, Yutaka Yamanoi
IEEE Transactions on Applied Superconductivity   26    Jun 2016
© 2002-2011 IEEE. We developed a Lambertson magnet and two septum magnets as the splitting devices for the new beamline at the Hadron Experimental Facility in J-PARC. This new beamline, now under construction, is called high-p/COMET beamline, and ...
Shunsuke Kanatsuki, N. Amano, H. Ekawa, T. Nanamura, T. Nagae, K. Takenaka, T. Gogami, M. Moritsu, E. Hirose, H. Takahashi, T. Takahashi, S. Kato, Y. Ichikawa
Proceedings of Science   2016-September    Jan 2016
© Copyright owned by the author(s). Spectroscopy of strangeness -2 systems has not been greatly in progress, because of the limited K-beam intensity to produce such systems and the limited energy resolution to identify them. Increasing K-beam inte...
H. Takahashi, et al.
IEEE Transactions on Applied Superconductivity   26(4) 4001204-1-4001204-4   2016   [Refereed]
H. Takahashi, K. Agari, K. Aoki, M. Hagiwara, E. Hirose, M. Ieiri, R. Iwasaki, Y. Katoh, M. Minakawa, R. Muto, M. Naruki, H. Noumi, Y. Sato, S. Sawada, Y. Shirakabe, Y. Suzuki, K. H. Tanaka, A. Toyoda, H. Watanabe, Y. Yamanoi
Journal of Radioanalytical and Nuclear Chemistry   305 803-809   Sep 2015
© 2015, Akadémiai Kiadó, Budapest, Hungary. After the radioactive material leak accident at the J-PARC hadron experimental facility on May 23, 2013, we designed a new production target, which is capable of a primary proton beam with the energy of ...
K. Nakazawa, Y. Endo, S. Fukunaga, K. Hoshino, S. H. Hwang, K. Imai, H. Ito, K. Itonaga, T. Kanda, M. Kawasaki, J. H. Kim, S. Kinbara, H. Kobayashi, A. Mishina, S. Ogawa, H. Shibuya, T. Sugimura, M. K. Soe, H. Takahashi, T. Takahashi, K. T. Tint, K. Umehara, C. S. Yoon, J. Yoshida
Progress of Theoretical and Experimental Physics   2015    Nov 2014
© The Author(s) 2015. Published by Oxford University Press on behalf of the Physical Society of Japan. We have observed a deeply bound state of the Tex-Tex system that decayed into twin single-hypernuclei in nuclear emulsion exp...
M. Moritsu, S. Adachi, M. Agnello, S. Ajimura, K. Aoki, H. C. Bhang, B. Bassalleck, E. Botta, S. Bufalino, N. Chiga, H. Ekawa, P. Evtoukhovitch, A. Feliciello, H. Fujioka, S. Hayakawa, F. Hiruma, R. Honda, K. Hosomi, Y. Ichikawa, M. Ieiri, Y. Igarashi, K. Imai, N. Ishibashi, S. Ishimoto, K. Itahashi, R. Iwasaki, C. W. Joo, S. Kanatsuki, M. J. Kim, S. J. Kim, R. Kiuchi, T. Koike, Y. Komatsu, V. V. Kulikov, S. Marcello, S. Masumoto, Y. Matsumoto, K. Matsuoka, K. Miwa, T. Nagae, M. Naruki, M. Niiyama, H. Noumi, Y. Nozawa, R. Ota, K. Ozawa, N. Saito, A. Sakaguchi, H. Sako, V. Samoilov, M. Sato, S. Sato, Y. Sato, S. Sawada, M. Sekimoto, K. Shirotori, H. Sugimura, S. Suzuki, H. Takahashi, T. Takahashi, T. N. Takahashi, H. Tamura, T. Tanaka, K. Tanida, A. O. Tokiyasu, N. Tomida, Z. Tsamalaidze, M. Ukai, K. Yagi, T. O. Yamamoto, S. B. Yang, Y. Yonemoto, C. J. Yoon, K. Yoshida
Physical Review C - Nuclear Physics   90    Sep 2014
© 2014 American Physical Society. The pentaquark Θ+ has been searched for via the π-p→K-X reaction with beam momenta of 1.92 and 2.01 GeV/c at J-PARC. A missing mass resolution of 2 MeV (FWHM) was achieved but no sharp peak structure was observed....
H. Sako, J. K. Ahn, K. Y. Baek, B. Bassalleck, H. Fujioka, L. Guo, S. Hasegawa, K. Hicks, R. Honda, S. H. Hwang, Y. Ichikawa, M. Ieiri, K. Imai, S. H. Kim, R. Kiuchi, H. S. Lee, K. Nakazawa, M. Naruki, A. Ni, M. Niiyama, K. Ozawa, J. Y. Park, S. H. Park, S. Y. Ryu, S. Sato, K. Shirotori, H. Sugimura, M. Sumihara, K. Tanida, H. Takahashi, T. Takahashi
EPJ Web of Conferences   66    Apr 2014
H-dibaryon has been predicted as a stable 6-quark color-singlet state. It has been searched for by many experiments but has never been discovered. Recent lattice QCD calculations predict H-dibaryon as a weakly bound or a resonant state close to th...
H. Sako, J. K. Ahn, K. H. Baek, B. Bassalleck, H. Fujioka, L. Guo, S. Hasegawa, K. Hicks, R. Honda, S. H. Hwang, Y. Ichikawa, M. Ieiri, K. Imai, S. H. Kim, R. Kiuchi, H. S. Lee, K. Nakazawa, M. Naruki, A. Ni, M. Niiyama, K. Ozawa, J. Y. Park, S. Y. Ryu, S. Sato, K. Shirotori, H. Sugimura, M. Sumihara, K. Tanida, H. Takahashi, T. Takahashi
Journal of Instrumentation   9    Jan 2014
We have developed a GEM-TPC for H-dibaryon search at J-PARC E42, which reconstructs charged particles from the H-dibaryon decay in (K -,K+) reaction. Since 106 cps/cm2 K- beams are injected to...
Masaharu Ieiri, Michifumi Minakawa, Keizo Agari, Erina Hirose, Yohji Katoh, Ryotaro Muto, Megumi Naruki, Hiroyuki Noumi, Yoshinori Sato, Shin'Ya Sawada, Yoshihisa Shirakabe, Yoshihiro Suzuki, Hitoshi Takahashi, Minoru Takasaki, Kazuhiro H. Tanaka, Akihisa Toyoda, Hiroaki Watanabe, Yutaka Yamanoi
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms   317 338-341   Dec 2013
An electrostatic separator is one of the key elements of a secondary beam line at the Hadron experimental hall of J-PARC. It generates a transverse electric field along the beam axis to separate particles of the same momentum by their mass differe...
H. Takahashi
Nuclear Physics A   914 553-558   Sep 2013
Experiments with strangeness of -3 are now being planned at the J-PARC hadron experimental facility (HD-hall) to study ΩN interaction and structure of Ω baryons. In order to perform S = - 3 experiments, two new beam lines are to be constructed in ...
M. Moritsu, S. Adachi, M. Agnello, S. Ajimura, K. Aoki, H. C. Bhang, B. Bassalleck, E. Botta, S. Bufalino, N. Chiga, H. Ekawa, P. Evtoukhovitch, A. Feliciello, H. Fujioka, S. Hayakawa, F. Hiruma, R. Honda, K. Hosomi, Y. Ichikawa, M. Ieiri, Y. Igarashi, K. Imai, N. Ishibashi, S. Ishimoto, K. Itahashi, R. Iwasaki, C. W. Joo, S. Kanatsuki, M. J. Kim, S. J. Kim, R. Kiuchi, T. Koike, Y. Komatsu, V. V. Kulikov, S. Marcello, S. Masumoto, Y. Matsumoto, K. Matsuoka, K. Miwa, T. Nagae, M. Naruki, M. Niiyama, H. Noumi, Y. Nozawa, R. Ota, K. Ozawa, N. Saito, A. Sakaguchi, H. Sako, V. Samoilov, M. Sato, S. Sato, Y. Sato, S. Sawada, M. Sekimoto, K. Shirotori, H. Sugimura, S. Suzuki, H. Takahashi, T. Takahashi, T. N. Takahashi, H. Tamura, T. Tanaka, K. Tanida, A. O. Tokiyasu, N. Tomida, Z. Tsamalaidze, M. Ukai, K. Yagi, T. O. Yamamoto, S. B. Yang, Y. Yonemoto, C. J. Yoon, K. Yoshida
Nuclear Physics A   914 91-96   Sep 2013
We have been searching for the Θ + pentaquark via the π -p → K -X reaction at the J-PARC hadron facility. No peak structure was observed in the missing mass spectrum obtained at 1.92GeV/c beam momentum. The upper limit for the production cross sec...
M. Naruki, S. Adachi, M. Agnello, S. Ajimura, K. Aoki, H. Bang, B. Bassalleck, E. Botta, S. Bufalino, H. Ekawa, P. Evtoukhovitch, A. Feliciello, H. Fujioka, S. Hayakawa, F. Hiruma, R. Honda, K. Hosomi, Y. Ichikawa, M. Ieiri, Y. Igarashi, K. Imai, N. Ishibashi, S. Ishimoto, K. Itahashi, R. Iwasaki, G. G. Joo, S. Kanatsuki, M. J. Kim, S. J. Kim, R. Kiuchi, T. Koike, Y. Komatsu, V. V. Kulikov, S. Marcello, S. Masumoto, Y. Matsumoto, K. Matsuoka, K. Miwa, M. Moritsu, T. Nagae, M. Niiyama, H. Noumi, Y. Nozawa, R. Ota, K. Ozawa, N. Saito, A. Sakaguchi, H. Sako, V. Samoilov, M. Sato, S. Sato, Y. Sato, S. Sawada, M. Sekimoto, K. Shirotori, H. Sugimura, S. Suzuki, T. N. Takahashi, H. Takahashi, T. Takahashi, H. Tamura, T. Tanaka, K. Tanida, A. O. Tokiyasu, N. Tomida, Z. Tsamalaidze, M. Ukai, K. Yagi, T. O. Yamamoto, S. B. Yang, Y. Yonemoto, C. J. Yoon, K. Yoshida
Few-Body Systems   54 955-960   Aug 2013
The first experiment at the J-PARC hadron facility, the J-PARC E19 experiment, aims at searching for the Θ+ pentaquark in the hadronic reaction π- p → K- X using the missing-mass technique. Based on a superconducting magnet excited at 2.5 T, the s...
J. K. Ahn, H. Akikawa, S. Aoki, K. Arai, S. Y. Bahk, K. M. Baik, B. Bassalleck, J. H. Chung, M. S. Chung, D. H. Davis, T. Fukuda, K. Hoshino, A. Ichikawa, M. Ieiri, K. Imai, K. Itonaga, Y. H. Iwata, Y. S. Iwata, H. Kanda, M. Kaneko, T. Kawai, M. Kawasaki, C. O. Kim, J. Y. Kim, S. H. Kim, S. J. Kim, Y. Kondo, T. Kouketsu, H. N. Kyaw, Y. L. Lee, J. W.C. McNabb, A. A. Min, M. Mitsuhara, K. Miwa, K. Nakazawa, Y. Nagase, C. Nagoshi, Y. Nakanishi, H. Noumi, S. Ogawa, H. Okabe, K. Oyama, B. D. Park, H. M. Park, I. G. Park, J. Parker, Y. S. Ra, J. T. Rhee, A. Rusek, A. Sawa, H. Shibuya, K. S. Sim, P. K. Saha, D. Seki, M. Sekimoto, J. S. Song, H. Takahashi, T. Takahashi, F. Takeutchi, H. Tanaka, K. Tanida, K. T. Tint, J. Tojo, H. Torii, S. Torikai, D. N. Tovee, T. Tsunemi, M. Ukai, N. Ushida, T. Wint, K. Yamamoto, N. Yasuda, J. T. Yang, C. J. Yoon, C. S. Yoon, M. Yosoi, T. Yoshida, L. Zhu
Physical Review C - Nuclear Physics   88    Jul 2013
A hybrid experiment with nuclear emulsion and scintillating-fiber detectors (KEK-E373) has been performed to search for double-strangeness systems. Among about 103 events of Ξ- hyperons captured at rest by emulsion nuclei, we have observed four ev...
Y. Sato, K. Agari, E. Hirose, M. Ieiri, Y. Katoh, M. Minakawa, R. Muto, M. Naruki, S. Sawada, Y. Shirakabe, Y. Suzuki, H. Takahashi, M. Takasaki, K. H. Tanaka, A. Toyoda, H. Watanabe, Y. Yamanoi, H. Noumi
IBIC 2012 - Proceedings of the 1st International Beam Instrumentation Conference   267-270   Jun 2013
Copyright © 2013 by JACoW. Residual gas ionization profile monitors (RGIPMs) for slowly extracted proton beams at Japan Proton Accelerator Facility Complex (J-PARC) have been developed to monitor transverse profiles of intense proton beams up to 5...
T. Kishimoto, F. Khanam, T. Hayakawa, S. Ajimura, T. Itabashi, K. Matsuoka, S. Minami, Y. Mitoma, A. Sakaguchi, Y. Shimizu, K. Terai, T. Sato, H. Noumi, M. Sekimoto, H. Takahashi, T. Fukuda, W. Imoto, Y. Mizoi
Progress of Theoretical and Experimental Physics   2013    Apr 2013
We have searched for a bound kaon and pion state denoted by X. X was conjectured to explain the so-called + resonance as a bound kaon, pion, and nucleon state. This model explains almost all the properties of +; however, the model only works if th...
K. Shirotori, T. N. Takahashi, S. Adachi, M. Agnello, S. Ajimura, K. Aoki, H. C. Bhang, B. Bassalleck, E. Botta, S. Bufalino, N. Chiga, P. Evtoukhovitch, A. Feliciello, H. Fujioka, F. Hiruma, R. Honda, K. Hosomi, Y. Ichikawa, M. Ieiri, Y. Igarashi, K. Imai, N. Ishibashi, S. Ishimoto, K. Itahashi, R. Iwasaki, C. W. Joo, M. J. Kim, S. J. Kim, R. Kiuchi, T. Koike, Y. Komatsu, V. V. Kulikov, S. Marcello, S. Masumoto, K. Matsuoka, K. Miwa, M. Moritsu, T. Nagae, M. Naruki, M. Niiyama, H. Noumi, K. Ozawa, N. Saito, A. Sakaguchi, H. Sako, V. Samoilov, M. Sato, S. Sato, Y. Sato, S. Sawada, M. Sekimoto, H. Sugimura, S. Suzuki, H. Takahashi, T. Takahashi, H. Tamura, T. Tanaka, K. Tanida, A. O. Tokiyasu, N. Tomida, Z. Tsamalaidze, M. Ukai, K. Yagi, T. O. Yamamoto, S. B. Yang, Y. Yonemoto, C. J. Yoon, K. Yoshida
Physical Review Letters   109    Sep 2012
The Θ + pentaquark baryon was searched for via the π -p→K -X reaction with a missing mass resolution of 1.4MeV/c2 (FWHM) at the Japan Proton Accelerator Research Complex (J-PARC). π - meson beams were incident on the liquid hydrogen target with a ...
E. Hirose, K. H. Tanaka, H. Takahashi, K. Agari, M. Ieiri, Y. Katoh, M. Minakawa, R. Muto, M. Naruki, H. Noumi, Y. Sato, Y. Suzuki, M. Takasaki, A. Toyoda, Y. Yamada, Y. Yamanoi, H. Watanabe, H. Tanaka, K. Kato, Y. Saitoh, M. Saijyo, Y. Satoh
IEEE Transactions on Applied Superconductivity   22    Jun 2012
The construction of the facility of the long baseline neutrino oscillation experiment using the J-PARC's 50 GeV-0.75 MW proton beam was completed at the end of 2008. The number of radiation-resistant magnets we have prepared for the neutrino beaml...
K. H. Tanaka, E. Hirose, H. Takahashi, K. Agari, M. Ieiri, Y. Katoh, M. Minakawa, R. Muto, M. Naruki, Y. Sato, S. Sawada, Y. Suzuki, M. Takasaki, A. Toyoda, H. Watanabe, Y. Yamanoi, H. Noumi, K. Kato, M. Saijyo, Y. Saitoh, H. Satoh, Y. Satoh, K. Yahata, T. Birumachi
IEEE Transactions on Applied Superconductivity   22    Jun 2012
In order to handle high intensity primary proton beam provided by Japan Proton Accelerator Research Complex (J-PARC), radiation-resistant beam lines have been constructed at Hadron Experimental Hall of J-PARC. The key technology of the radiation-r...
H. Takahashi, K. Agari, E. Hirose, M. Ieiri, M. Iio, Y. Katoh, M. Minakawa, R. Muto, M. Naruki, H. Noumi, Y. Sato, S. Sawada, Y. Shirakabe, Y. Suzuki, M. Takasaki, K. H. Tanaka, A. Toyoda, H. Watanabe, Y. Yamanoi, T. Kawada, K. Ogata, M. Saijyo, Y. Saitoh, Y. Satoh, K. Katoh, K. Yahata
IEEE Transactions on Applied Superconductivity   22    Jun 2012
We have developed the most upstream dipole magnet K1.1D1 for a new secondary beam line at the hadron experimental hall in J-PARC. It is placed downstream of a production target and is close to the K1.8D1 magnet. Indirectly cooled coils using miner...
Keizo Agari, Shun Enomoto, Hiroyuki Fujioka, Yuya Fujiwara, Tadashi Hashimoto, Ryugo S. Hayano, Toshihiko Hiraiwa, Erina Hirose, Masaharu Ieiri, Youichi Igarashi, Masami Iio, Jun Imazato, Kentaro Inoue, Yosuke Ishiguro, Kenta Itahashi, Masahiko Iwasaki, Yohji Katoh, Shingo Kawasaki, Akio Kiyomichi, Hiroshi Kou, Michifumi Minakawa, Ryotaro Muto, Tomofumi Nagae, Megumi Naruki, Hiroyuki Noumi, Hiroaki Ohnishi, Haruhiko Outa, Yuta Sada, Fuminori Sakuma, Masaharu Sato, Yoshinori Sato, Shin'Ya Sawada, Hexi Shi, Yoshihisa Shirakabe, Yoshihiro Suzuki, Hitoshi Takahashi, Toshiyuki Takahashi, Minoru Takasaki, Kazuhiro H. Tanaka, Makoto Tokuda, Akihisa Toyoda, Kyo Tsukada, Mifuyu Ukai, Hiroaki Watanabe, Takeshi O. Yamamoto, Yutaka Yamanoi
Progress of Theoretical and Experimental Physics   2012    Jan 2012
© The Author(s) 2012. Three beam lines for secondary charged particles are constructed in the hadron experimental hall of J-PARC. The K1.8 beam line, which incorporates two separators, delivers clean beams of kaons up to 2GeV/c. The K1.8BR beam li...
Satoshi Adachi, Michelangelo Agnello, Kanae Aoki, Osamu Araoka, Bernd Bassalleck, Elena Botta, Stefania Bufalino, Nobuyuki Chiga, Petr Evtoukhovitch, Alessandro Feliciello, Juergen Franz, Hiroyuki Fujioka, Shuhei Hayakawa, Erina Hirose, Ryotaro Honda, Kenji Hosomi, Yudai Ichikawa, Youichi Igarashi, Masahisa Iida, Masahiro Ikeno, Kenta Itahashi, Naoya Ishibashi, Shigeru Ishimoto, Ruri Iwasaki, Yutaka Kakiguchi, Katsuyu Kasami, Sunji Kim, Ryuta Kiuchi, Takeshi Koike, Yusuke Komatsu, Alexandr Kustov, David Mjavia, Yasuhiro Makida, Simonetta Marcello, Tomofumi Maruta, Shinichi Masumoto, Kenji Matsuoka, Koji Miwa, Anatolii Moiseenko, Manabu Moritsu, Tomofumi Nagae, Megumi Naruki, Hiroyuki Noumi, Hirokazu Ohhata, Takahiro Okamura, Ryosuke Ota, Masatoshi Saito, Atsushi Sakaguchi, Valentin Samoilov, Misako Sato, Yoshinori Sato, Michiko Sekimoto, Yoshihisa Shirakabe, Kotaro Shirotori, Hitoshi Sugimura, Shoji Suzuki, Yoshihiro Suzuki, Hitoshi Takahashi, Tomonori N. Takahashi, Hirokazu Tamura, Manobu Tanaka, Kazuya Tauchi, Toshiyuki Tanaka, Kiyoshi Tanida, Atsushi O. Tokiyasu, Kotaro Yoshida, Akihisa Toyoda, Zviadi Tsamalaidze, Tomohisa Uchida, Mifuyu Ukai, Hiroaki Watanabe, Takeshi O. Yamamoto, Yoshio Yonemoto, Choong Jae Yoon
Progress of Theoretical and Experimental Physics   2012    Jan 2012
© The Author(s) 2012. High-resolution spectrometers for both incident beams and scattered particles have been constructed at the K1.8 beam line of the Hadron Experimental Facility at J-PARC. A point-to-point optics is realized between the entrance...
Keizo Agari, Erina Hirose, Masaharu Ieiri, Masami Iio, Yoji Katoh, Akio Kiyomichi, Michifumi Minakawa, Ryotaro Muto, Megumi Naruki, Hiroyuki Noumi, Yoshinori Sato, Shin'Ya Sawada, Yoshihisa Shirakabe, Yoshihiro Suzuki, Hitoshi Takahashi, Minoru Takasaki, Kazuhiro H. Tanka, Akihisa Toyoda, Hiroaki Watanabe, Yutaka Yamanoi
Progress of Theoretical and Experimental Physics   2012    Jan 2012
© The Author(s) 2012. A brief description of the primary beam line at the hadron experimental facility at the Japan Proton Accelerator Research Complex (J-PARC) is presented. The facility has been constructed in Tokai, Japan, and the first beam wa...
Keizo Agari, Shuhei Ajimura, George Beer, Hyoungchan Bhang, Mario Bragadireanu, Paul Buehler, Luigi Busso, Michael Cargnelli, Seonho Choi, Catalina Curceanu, Shun Enomoto, Diego Faso, Hiroyuki Fujioka, Yuya Fujiwara, Tomokazu Fukuda, Carlo Guaraldo, Tadashi Hashimoto, Ryugo S. Hayano, Toshihiko Hiraiwa, Erina Hirose, Masaharu Ieiri, Masami Iio, Mihai Iliescu, Kentaro Inoue, Yosuke Ishiguro, Takashi Ishikawa, Shigeru Ishimoto, Tomoichi Ishiwatari, Kenta Itahashi, Masaaki Iwai, Masahiko Iwasaki, Yutaka Kakiguchi, Yohji Katoh, Shingo Kawasaki, Paul Kienle, Hiroshi Kou, Yue Ma, Johann Marton, Yasuyuki Matsuda, Michifumi Minakawa, Yutaka Mizoi, Ombretta Morra, Ryotaro Muto, Tomofumi Nagae, Megumi Naruki, Hiroyuki Noumi, Hiroaki Ohnishi, Shinji Okada, Haruhiko Outa, Kristian Piscicchia, Marco Poli Lener, Antonio Romero Vidal, Yuta Sada, Atsushi Sakaguchi, Fuminori Sakuma, Masaharu Sato, Yoshinori Sato, Shin'Ya Sawada, Alessandro Scordo, Michiko Sekimoto, Hexi Shi, Yoshihisa Shirakabe, Diana Sirghi, Florin Sirghi, Ken Suzuki, Shoji Suzuki, Takatoshi Suzuki, Yoshihiro Suzuki, Hitoshi Takahashi, Kazuhiro Tanaka, Nobuaki Tanaka, Hideyuki Tatsuno, Makoto Tokuda, Dai Tomono, Akihisa Toyoda, Kyo Tsukada, Oton Vazquez Doce, Hiroaki Watanabe, Eberhard Widmann, Barbara K. Wünschek, Yutaka Yamanoi, Toshimitsu Yamazaki, Heejoong Yim, Johann Zmeskal
Progress of Theoretical and Experimental Physics   2012    Jan 2012
© The Author(s) 2012. A new spectrometer system has been designed and constructed at the secondary beam line K1.8BR in the hadron hall of J-PARC to investigate - K N interactions and -K -nuclear bound systems. The spectrometer consists of a high p...
K. Agari, E. Hirose, M. Ieiri, Y. Katoh, M. Minakawa, R. Muto, M. Naruki, Y. Sato, S. Sawada, Y. Shirakabe, Y. Suzuki, H. Takahashi, M. Takasaki, K. H. Tanaka, A. Toyoda, H. Watanabe, Y. Yamanoi, H. Noumi
IPAC 2011 - 2nd International Particle Accelerator Conference   1608-1610   Dec 2011
Hadron hall at Japan Proton Accelerator Research Complex (J-PARC) is designed to handle intense slowextraction proton beam from the main accelerator, i.e. 50- GeV-PS. The civil construction of Hadron hall had been completed in Jun. 2007. The first...
C. J. Yoon, H. Akikawa, K. Aoki, Y. Fukao, H. Funahashi, M. Hayata, K. Imai, K. Miwa, H. Okada, N. Saito, H. D. Sato, K. Shoji, H. Takahashi, K. Taketani, J. Asai, M. Kurosawa, M. Ieiri, T. Hayakawa, T. Kishimoto, A. Sato, Y. Shimizu, K. Yamamoto, T. Yoshida, T. Hibi, K. Nakazawa, J. K. Ahn, B. H. Choi, S. J. Kim, S. H. Kim, B. D. Park, I. G. Park, J. S. Song, C. S. Yoon, K. Tanida, A. Ohnishi
Journal of the Korean Physical Society   59 1003-1006   Aug 2011
We determined scattering length and effective range of ΛΛ scattering for the ΛΛ relative energy (MΛΛ-2MΛ) from ΛΛ threshold to 30 MeV/c2. Phase shift of the ΛΛ wave function which described by scattering length and effective range was determined b...
H. Takahashi, K. Agari, E. Hirose, M. Ieiri, Y. Katoh, A. Kiyomichi, M. Minakawa, R. Muto, M. Naruki, H. Noumi, Y. Sato, S. Sawada, Y. Shirakabe, Y. Suzuki, M. Takasaki, K. H. Tanaka, A. Toyoda, H. Watanabe, Y. Yamanoi
Journal of Physics: Conference Series   312    Jan 2011
The new facility J-PARC has been constructed in Tokai, Japan. It aims at providing intense proton beams of 750 kW for next-generation particle and nuclear physics experiments. The Hadron Experimental Hall (HD-hall) is one of the two facilities at ...
T. N. Takahashi, S. Ajimura, S. Dairaku, H. Fujimura, H. Fujioka, K. Imai, S. Ishimoto, T. Maruta, K. Miwa, D. Nakajima, Y. Nakatsugawa, M. Niiyama, N. Saito, Y. Sato, S. Sawada, H. Takahashi, T. Takahashi, A. Toyoda, M. Sekimoto, H. Tamura, K. Tanida
Proceedings of the Sendai International Symposium: Strangeness in Nuclear and Hadronic Systems, SENDAI 2008   412-413   Dec 2010
We will perform an experimental search for Θ+ pentaquark via the π-p → K-X reaction at the J-PARC K1.8 beamline using high-resolution spectrometers for both incident and scattered particles. This experiment is a natural expansion of KEK-E522.
Y. Sato, K. Agari, E. Hirose, M. Ieiri, Y. Katoh, A. Kiyomichi, M. Minakawa, R. Muto, M. Naruki, S. Sawada, Y. Suzuki, H. Takahashi, M. Takasaki, K. H. Tanaka, A. Toyoda, H. Watanabe, Y. Yamanoi, H. Noumi
Proceedings of the Sendai International Symposium: Strangeness in Nuclear and Hadronic Systems, SENDAI 2008   371-378   Dec 2010
J-PARC Hadron Experimental Facility is designed to carry out a variety of particle and nuclear physics experiments with intense secondary particles generated by 750 kW proton beams. The first construction stage including the experimental hall, the...
C. J. Yoon, H. Akikawa, K. Aoki, Y. Fukao, H. Funahashi, M. Hayata, K. Imai, K. Miwa, H. Okada, N. Saito, H. D. Sato, K. Shoji, H. Takahashi, K. Taketani, J. Asai, M. Kurosawa, M. Ieiri, T. Hayakawa, T. Kishimoto, A. Sato, Y. Shimizu, K. Yamamoto, T. Yoshida, T. Hibi, K. Nakazawa, J. K. Ahn, B. H. Choi, S. J. Kim, S. H. Kim, B. D. Park, I. G. Park, J. S. Song, C. S. Yoon, K. Tanida, A. Ohnishi
Proceedings of the Sendai International Symposium: Strangeness in Nuclear and Hadronic Systems, SENDAI 2008   156-161   Dec 2010
We determine ΛΛ scattering parameters from a ΛΛ invariant mass spectrum that was obtained by 12C(K-, K+ΛΛ) reaction at the KEK Proton Synchrotron. In the framework of Watson's procedure, the obtained scattering length a ΛΛ = -0.10 +0.45-2.37 ± 0.0...
M. Ieiri, M. Minakawa, K. Agari, E. Hirose, Y. Katoh, R. Muto, M. Naruki, Y. Sato, S. Sawada, Y. Suzuki, H. Takahashi, T. Takahashi, M. Takasaki, K. Tanaka, A. Toyoda, H. Watanabe, Y. Yamanoi, H. Noumi
IPAC 2010 - 1st International Particle Accelerator Conference   4161-4163   Dec 2010
The secondary beam line with two electrostatic (ES) separators to deliver 1-2GeV/c kaon beams has been constructed at the high intensity proton accelerator facility (J-PARC). The ES separator is designed so as to be radiation-proof and to lower sp...
Akihisa Toyoda, Keizo Agari, Erina Hirose, Masaharu Ieiri, Yohji Katoh, Akio Kiyomichi, Michifumi Minakawa, Megumi Naruki, Yoshinori Sato, Shinya Sawada, Yoshihiro Suzuki, Hitoshi Takahashi, Hiroaki Watanabe, Yutaka Yamanoi, Toshiyuki Mitsuhashi, Ryotaro Muto, Minoru Takasaki, Kazuhiro Tanaka, Hiroyuki Noumi
IPAC 2010 - 1st International Particle Accelerator Conference   1017-1019   Dec 2010
Optical beam measurement such as OTR (Optical Transition Radiation), ODR (Optical Diffraction Radiation), gas Cherenkov, and so on is a powerful tool to observe a two-dimensional information of high intensity beam profile, so that this method is w...
C. J. Yoon, H. Akikawa, K. Aoki, Y. Fukao, H. Funahashi, M. Hayata, K. Imai, K. Miwa, H. Okada, N. Saito, H. D. Sato, K. Shoji, H. Takahashi, K. Taketani, J. Asai, M. Kurosawa, M. Ieiri, T. Hayakawa, T. Kishimoto, A. Sato, Y. Shimizu, K. Yamamoto, T. Yoshida, T. Hibi, K. Nakazawa, J. K. Ahn, B. H. Choi, S. J. Kim, S. H. Kim, B. D. Park, I. G. Park, J. S. Song, C. S. Yoon, K. Tanida, A. Ohnishi
International Journal of Modern Physics E   19 2448-2453   Dec 2010
We determine ΛΛ scattering parameters from a ΛΛ invariant mass spectrum that was obtained by 12C(K-, K+ΛΛ) reaction at the KEK Proton Synchrotron. In the framework of Watson's procedure, the obtained scattering length αΛ Λ = - 0.10,-2.37+ 0.45,0.0...
Y. Sato, K. Agari, E. Hirose, M. Ieiri, Y. Katoh, A. Kiyomichi, M. Minakawa, R. Muto, M. Naruki, S. Sawada, Y. Suzuki, H. Takahashi, M. Takasaki, K. H. Tanaka, A. Toyoda, H. Watanabe, Y. Yamanoi, H. Noumi
International Journal of Modern Physics E   19 2663-2670   Dec 2010
J-PARC Hadron Experimental Facility is designed to carry out a variety of particle and nuclear physics experiments with intense secondary particles generated by 750 kW proton beams. The first construction stage including the experimental hall, the...
Yoshinori Sato, Keizo Agari, Erina Hirose, Masaharu Ieiri, Yohji Katoh, Akio Kiyomichi, Michifumi Minakawa, Ryotaro Muto, Megumi Naruki, Hiroyuki Noumi, Shin'ya Sawada, Yoshihisa Shirakabe, Yoshihiro Suzuki, Hitoshi Takahashi, Minoru Takasaki, Kazuhiro Tanaka, Akihisa Toyoda, Yutaka Yamanoi, Hiroaki Watanabe
AIP Conference Proceedings   1235 301-307   Jul 2010
J-PARC Hadron Experimental Facility is designed as a multi-purpose experimental facility for particle and nuclear physics experiments using high-intensity secondary particles (Kaons, pions, and so on) produced by 50GeV-15μA (750kW) primary proton ...
K. H. Tanaka, E. Hirose, H. Takahashi, K. Agari, M. Ieiri, Y. Katoh, A. Kiyomichi, M. Minakawa, R. Muto, M. Naruki, H. Noumi, Y. Sato, S. Sawada, Y. Suzuki, M. Takasaki, A. Toyoda, H. Watanabe, Y. Yamanoi, M. Iio, K. Kato, T. Ozawa, M. Saijyo, Y. Saitoh, H. Satoh, K. Yahata, T. Birumachi
IEEE Transactions on Applied Superconductivity   20 340-343   Jun 2010
More than 50 radiation-resistant electromagnets were constructed for the primary proton and the secondary particle beam lines of the Hadron Experimental Hall of Japan Proton Accelerator Research Complex (J-PARC). The main radiation-resistant techn...
H. Takahashi, K. Agari, E. Hirose, M. Ieiri, M. Iio, Y. Katoh, A. Kiyomichi, M. Minakawa, R. Muto, M. Naruki, H. Noumi, Y. Sato, S. Sawada, Y. Shirakabe, Y. Suzuki, M. Takasaki, K. H. Tanaka, A. Toyoda, H. Watanabe, Y. Yamanoi, K. Ogata, M. Saijyo, Y. Saitoh, K. Katoh, K. Yahata
IEEE Transactions on Applied Superconductivity   20 344-347   Jun 2010
The target station in the hadron experimental facility at J-PARC consists of a production target and a huge vacuum chamber in which several secondary-beam-line magnets can work. This vacuum chamber system aims to remove the vacuum beam pipe from t...
Kazuma Nakazawa, Hitoshi Takahashi
Progress of Theoretical Physics   335-343   May 2010
Our experimental knowledge concerning double strangeness system is summarized, briefly. Latest numerical values of energies are given for Λ-Λ interaction and binding of two Λ hyperons in several nuclei. A double-Λ hypernucleus of ΛΛ6He ("Lambpha" ...
A. Toyoda, K. Agari, E. Hirose, M. Ieiri, Y. Katoh, A. Kiyomichi, M. Minakawa, T. Mitsuhashi, R. Muto, M. Naruki, Y. Sato, S. Sawada, Y. Shirakabe, Y. Suzuki, H. Takahashi, M. Takasaki, K. H. Tanaka, H. Watanabe, Y. Yamanoi, H. Noumi
DIPAC 2009 - 9th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators   372-374   Dec 2009
We have continuously developed the Optical Transition Radiation (OTR) monitor with optics system based on the Newtonian telescope to measure a profile for a high intensity proton beamline. Now we installed the OTR monitors of production version on...
S. Aoki, S. Y. Bahk, S. H. Chung, H. Funahashi, C. H. Hahn, M. Hanabata, T. Hara, S. Hirata, K. Hoshino, M. Ieiri, T. Iijima, K. Imai, Y. Itow, T. Jin-ya, M. Kazuno, C. O. Kim, J. Y. Kim, S. H. Kim, K. Kodama, T. Kuze, Y. Maeda, A. Masaike, A. Masuoka, Y. Matsuda, A. Matsui, Y. Nagase, C. Nagoshi, M. Nakamura, S. Nakanishi, T. Nakano, K. Nakazawa, K. Niwa, H. Oda, H. Okabe, S. Ono, R. Ozaki, B. D. Park, I. G. Park, K. Sakai, T. Sasaki, Y. Sato, H. Shibuya, H. M. Shimizu, J. S. Song, M. Sugimoto, H. Tajima, H. Takahashi, R. Takashima, F. Takeutchi, K. H. Tanaka, M. Teranaka, I. Tezuka, H. Togawa, T. Tsunemi, M. Ukai, N. Ushida, T. Watanabe, N. Yasuda, J. Yokota, C. S. Yoon
Nuclear Physics A   828 191-232   Sep 2009
An emulsion-counter hybrid experiment (KEK E176) was carried out to search for double strangeness systems such as double-Λ hypernuclei and H-dibaryons. More than 10% of Ξ- hyperons produced in the (K-, K+) reaction were brought to rest in the nucl...
T. Kishimoto, T. Hayakawa, S. Ajimura, F. Khanam, T. Itabashi, K. Matsuoka, S. Minami, Y. Mitoma, A. Sakaguchi, Y. Shimizu, K. Terai, R. E. Chrien, P. Pile, H. Noumi, M. Sekimoto, H. Takahashi, T. Fukuda, W. Imoto, Y. Mizoi
Nuclear Physics A   827    Aug 2009
We studied the over(K, ̄)-nucleus interaction by the (K-, N) reactions on 12C and 16O. An appreciable strength observed in a bound region indicates that the over(K, ̄)-nuclear potential is strongly attractive. Potential depth was derived by compar...
Masaharu Ieiri, Michifumi Minakawa, Keizo Agari, Yohji Katoh, Erina Hirose, Hiroyuki Noumi, Yoshinori Sato, Yoshihiro Suzuki, Hitoshi Takahashi, Minoru Takasaki, Kazuhiro Tanaka, Akihisa Toyoda, Yutaka Yamanoi, Hiroaki Watanabe
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms   266 4205-4208   Oct 2008
The new electrostatic (ES) separator to select and deliver 1-2 GeV/c kaon beams is made for the secondary beam line at the high intensity proton accelerator facility. The ES separator will generate a 75 kV/cm electrostatic field between parallel e...
E. Hirose, K. H. Tanaka, H. Takahashi, K. Agari, M. Ieiri, Y. Kato, M. Minakawa, H. Noumi, Y. Sato, Y. Suzuki, M. Takasaki, A. Toyoda, Y. Yamanoi, H. Watanabe, K. Kato, N. Saitoh, M. Saijyo
IEEE Transactions on Applied Superconductivity   18 1439-1442   Jun 2008
The high intensity proton accelerator facility J-PARC is now in its final stage of construction. Soon intense primary proton beams will be slowly extracted to an experimental hall (HD-hall) and transported to a production target. Since the radiati...
H. Takahashi, K. Agari, E. Hirose, M. Ieiri, M. Iio, Y. Katoh, M. Minakawa, R. Muto, M. Naruki, H. Noumi, Y. Sato, S. Sawada, Y. Suzuki, M. Takasaki, K. H. Tanaka, A. Toyoda, H. Watanabe, Y. Yamanoi, M. Saijo, Y. Saitoh, K. Katoh, K. Yahata
IEEE Transactions on Applied Superconductivity   18 322-325   Jun 2008
In a high-intensity proton beam facility, beam line elements downstream of a production target are exposed to a huge amount of radiation and heat. Beam pipes are closer to the beam than the magnet poles and more difficult to cool sufficiently with...
M. Ukai, S. Ajimura, H. Akikawa, D. E. Alburger, A. Banu, R. E. Chrien, G. B. Franklin, J. Franz, O. Hashimoto, T. Hayakawa, H. Hotchi, K. Imai, T. Kishimoto, M. May, D. J. Millener, S. Minami, Y. Miura, T. Miyoshi, K. Mizunuma, T. Nagae, S. N. Nakamura, K. Nakazawa, Y. Okayasu, P. Pile, B. P. Quinn, A. Rusek, Y. Sato, R. Sutter, H. Takahashi, L. Tang, H. Tamura, K. Tanida, S. H. Zhou
Physical Review C - Nuclear Physics   77    May 2008
The bound-state level structures of the Λ16O and Λ15N hypernuclei were studied by γ-ray spectroscopy using a germanium detector array (Hyperball) via the O16 (K-,π-γ) reaction. A level scheme for Λ16O was determined from the observation of three γ...
K. Miwa, S. Dairaku, D. Nakajima, S. Ajimura, J. Arvieux, H. Fujimura, H. Fujioka, T. Fukuda, H. Funahashi, M. Hayata, K. Hicks, K. Imai, S. Ishimoto, T. Kameyama, S. Kamigaito, S. Kinoshita, T. Koike, Y. Ma, T. Maruta, Y. Miura, M. Miyabe, T. Nagae, T. Nakano, K. Nakazawa, M. Naruki, H. Noumi, M. Niiyama, N. Saito, Y. Sato, S. Sawada, Y. Seki, M. Sekimoto, K. Senzaka, K. Shirotori, K. Shoji, S. Suzuki, H. Takahashi, T. Takahashi, T. N. Takahashi, H. Tamura, N. Tanaka, K. Tanida, A. Toyada, T. Watanabe, M. Yosoi, R. Zavislak
Physical Review C - Nuclear Physics   77    Apr 2008
The Θ+ was searched for via the K+p→π+X reaction using the 1.2 GeV/c K+ beam at the K6 beam line of the KEK-PS 12 GeV Proton Synchrotron. In the missing mass spectrum of the K+p→π+X reaction, no clear peak structure was observed. Therefore a 90% C...
K. H. Tanaka, E. Hirose, H. Takahashi, K. Agari, M. Ieiri, Y. Katoh, M. Minakawa, H. Noumi, Y. Sato, Y. Suzuki, M. Takasaki, A. Toyoda, H. Watanabe, Y. Yamanoi, T. Birumachi, K. Kato, T. Ozawa, M. Saijyo, Y. Saitoh, M. Tada, K. Yahata
IEEE Transactions on Applied Superconductivity   18 244-247   Jan 2008
A series of construction works of the radiation resistant magnets for the Japan Proton Accelerator Research Complex (J-PARC) external beam facilities is now at the production and installation stage. The main accelerator of J-PARC is the 50 GeV pro...
A. Toyoda, K. Agari, M. Ieiri, Y. Katoh, E. Hirose, M. Minakawa, H. Noumi, Y. Sato, Y. Suzuki, H. Takahashi, M. Takasaki, K. Tanaka, Y. Yamanoi, H. Watanabe, T. Mitsuhashi
8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2007   30-32   Dec 2007
The OTR (Optical Transition Radiation) is a powerful tool to observe 2-dimensional information of beam profile at the high intensity beam line because the OTR intensity only depends on the screen reflectivity so that we can minimize a beam loss. H...
H. Noumi, K. Agari, M. Ieiri, Y. Igarashi, S. Inaba, Y. Katoh, E. Hirose, M. Minakwa, T. Mitsuhashi, M. Saito, Y. Sato, Y. Suzuki, H. Takahashi, M. Takasaki, K. H. Tanaka, A. Toyoda, Y. Yamanoi, H. Watanabe
IEEE Nuclear Science Symposium Conference Record   3 2336-2339   Dec 2007
We developed beam diagnosis devices, a residual gas ionization beam profile monitor (RGIPM) and an optical transition radiation (OTR) monitor, for a high power proton beam transfer line at the SO-GeV proton synchrotron (PS) of the Japan Proton Acc...
Akihisa Toyoda, Keizo Agari, Masaharu Ieiri, Yohji Kato, Erina Hirose, Michifumi Minakawa, Toshiyuki Mitsuhashi, Hiroyuki Noumi, Yoshinori Sato, Yoshihiro Suzuki, Hitoshi Takahashi, Minoru Takasaki, Kazuhiro Tanaka, Yutaka Yamanoi, Hiroaki Watanabe
IEEE Nuclear Science Symposium Conference Record   3 1338-1341   Dec 2007
We developed the Optical Transition Radiation (OTR) monitor as a profile monitor for a high intensity (750 kW) slow-extraction beam line at the Japan Proton Accelerator Research Complex (J-PARC). The OTR monitor is considered to be one of good can...
T. Kishimoto, T. Hayakawa, S. Ajimura, F. Khanam, T. Itabashi, K. Matsuoka, S. Minami, Y. Mitoma, A. Sakaguchi, Y. Shimizu, K. Terai, R. E. Chrien, P. Pile, H. Noumi, M. Sekimoto, H. Takahashi, T. Fukuda, W. Imoto, Y. Mizor
Progress of Theoretical Physics Supplement   573-580   Dec 2007
We would like to point out that the (K̄, N) reactions are particularly useful for the study of the K̄-nucleus interaction. We have measured the missing mass spectra derived from the momenta of both neutrons and protons from the 12C(K̄, N) reaction...
T. Watanabe, J. K. Ahn, H. Akikawa, S. Aoki, K. Arai, S. Y. Bahk, K. M. Baik, B. Bassalleck, J. H. Chung, M. S. Chung, D. H. Davis, T. Fukuda, H. Hayata, K. Hoshino, A. Ichikawa, M. Ieiri, K. Imai, Y. H. Iwata, Y. S. Iwata, Y. Kakita, H. Kanda, M. Kaneko, T. Kawai, M. Kawasaki, C. O. Kim, J. Y. Kim, S. J. Kim, S. H. Kim, Y. Kondo, T. Kouketsu, Y. L. Lee, J. W.C. McNabb, M. Mitsuhara, Y. Nagase, C. Nagoshi, K. Nakazawa, H. Noumi, S. Ogawa, H. Okabe, K. Oyama, H. M. Park, I. G. Park, J. Parker, Y. S. Ra, J. T. Rhee, A. Rusek, H. Shibuya, K. S. Sim, P. K. Saha, D. Seki, M. Sekimoto, J. S. Song, H. Takahashi, T. Takahashi, F. Takeutchi, H. Tanaka, K. Tanida, J. Tojo, H. Torii, S. Torikai, T. Tsunemi, D. N. Tovee, N. Ushida, K. Yamamoto, N. Yasuda, J. T. Yang, C. J. Yoon, C. S. Yoon, M. Yosoi, T. Yoshida, L. Zhu
European Physical Journal A   33 265-268   Sep 2007
An event emitting a ∑- -hyperon from a Ξ- -hyperon nuclear capture at rest has been observed in a hybrid-emulsion experiment. The event has been analyzed as the first observation of the weak decay of the S = - 2 system. © 2007 Società Italiana di ...
M. Ukai, S. Ajimura, H. Akikawa, D. E. Alburger, A. Banu, R. E. Chrien, G. B. Franklin, J. Franz, O. Hashimoto, T. Hayakawa, H. Hotchi, K. Imai, T. Kishimoto, M. May, D. J. Millener, S. Minami, Y. Miura, T. Miyoshi, K. Mizunuma, T. Nagae, S. N. Nakamura, K. Nakazawa, Y. Okayasu, P. Pile, B. P. Quinn, A. Rusek, Y. Sato, R. Sutter, H. Takahashi, L. Tang, H. Tamura, K. Tanida, L. Yuan, S. H. Zhou
European Physical Journal A   33 247-250   Sep 2007
We have observed three γ -ray transitions in Λ16 O from both 7MeV excited spin-flip and non-spin-flip partners ( 2-, 1-2 to the ground-state doublet ( 1 -1, 0- via the 16O(K -,π-) reaction. The 7MeV excitation energies of the spin-doublet members ...
T. Kishimoto, T. Hayakawa, S. Ajimura, F. Khanam, T. Itabashi, K. Matsuoka, S. Minami, Y. Mitoma, A. Sakaguchi, Y. Shimizu, K. Terai, R. E. Chrien, P. Pile, H. Noumi, M. Sekimoto, H. Takahashi, T. Fukuda, W. Imoto, Y. Mizoi
Progress of Theoretical Physics   118 181-186   Jul 2007
We studied the K̄-nucleus interaction by the 12C(K -, N) reaction. Missing mass spectra were derived from the momenta of both neutrons and protons from the reaction. An appreciable strength was observed below the K̄-nucleus threshold, which indica...
C. J. Yoon, H. Akikawa, K. Aoki, Y. Fukao, H. Funahashi, M. Hayata, K. Imai, K. Miwa, H. Okada, N. Saito, H. D. Sato, K. Shoji, H. Takahashi, K. Taketani, J. Asai, M. Kurosawa, M. Ieiri, T. Hayakawa, T. Kishimoto, A. Sato, Y. Shimizu, K. Yamamoto, T. Yoshida, T. Hibi, K. Nakazawa, J. K. Ahn, B. H. Choi, S. J. Kim, S. H. Kim, B. D. Park, I. G. Park, J. S. Song, C. S. Yoon, K. Tanida, A. Ohnishi
Physical Review C - Nuclear Physics   75    Feb 2007
The H-dibaryon resonance was sought by a ΛΛ invariant mass spectrum that was obtained by the C12 (K-,K+ΛΛX) reactions. We observed a bump near the ΛΛ threshold, as reported by the previous experiment (KEK E224), with better statistics. Data were c...
K. H. Tanaka, E. Hirose, H. Takahashi, K. Agari, T. Watanabe, A. Toyoda, Y. Sato, M. Minakawa, H. Noumi, Y. Yamanoi, M. Ieiri, Y. Katoh, Y. Yamada, Y. Suzuki, M. Takasaki, T. Birumachi, S. Tsukada, T. Ozawa, Y. Saitoh, K. Kato, K. Yahata
IEEE Transactions on Applied Superconductivity   16 172-175   Jun 2006
Continuity R&D work is reported here on the radiation resistant magnets for the Japan Proton Accelerator Research Complex (J-PARC). The main accelerator of the J-PARC is the 50 GeV-15 mA proton synchrotron (50 GeV-PS) with beam power of 750 kW. Th...
E. Hirose, K. H. Tanaka, K. Agari, M. Ieiri, Y. Katoh, M. Minakawa, H. Noumi, Y. Sato, Y. Suzuki, H. Takahashi, M. Takasaki, A. Toyoda, Y. Yamada, Y. Yamanoi, H. Watanabe, H. Tanaka, K. Kato, N. Saitoh, M. Saijyo
IEEE Transactions on Applied Superconductivity   16 1342-1345   Jun 2006
The facility of the long baseline neutrino oscillation experiment using the J-PARC's 50 GeV-0.75 MW proton beam is now under way. The primary proton beam line consists of three sections, i.e. the first preparation (PP) section with normal conducti...
H. Takahashi, K. Agari, E. Hirose, M. Ieiri, Y. Katoh, M. Minakawa, H. Noumi, Y. Sato, Y. Suzuki, M. Takasaki, K. H. Tanaka, A. Toyoda, H. Watanabe, Y. Yamada, Y. Yamanoi, M. Saijo, Y. Saitoh, K. Katoh, K. Yahata
IEEE Transactions on Applied Superconductivity   16 1346-1349   Jun 2006
In a high-intensity proton beam facility, beam line elements downstream of a production target are exposed to a huge amount of radiation and heat. A water-cooled beam collimator must be located between the target and the magnets, and the iron yoke...
Maki Kurosawa, Jyunkichi Asai, Tomokazu Fukuda, Masaharu Ielri, Kenichi Imai, Wataru Imoto, Soma Iwata, Tetsuhito Kadowaki, Tomofumi Maruta, Tomofumi Nagae, Hiroyuki Noumi, Akira Sato, Hitoshi Takahashi, Choong Jae Yoon, Kozi Nakai
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers   45 4204-4213   May 2006
A new scintillation-track-image detector, SCITIC, has been developed and successfully used as an active target for hyperonscattering experiments. The principle and practical use in experiments of SCITIC have bean reported. In this paper, we presen...
K. Miwa, J. K. Ahn, K. Aoki, B. H. Choi, Y. Fukao, H. Funahashi, T. Hayakawa, M. Hayata, T. Hibi, M. Ieiri, K. Imai, S. J. Kim, K. Nakazawa, H. Nishikawa, H. Okada, N. Saito, H. D. Sato, K. Shoji, H. Takahashi, K. Taketani, K. Yamamoto, C. J. Yoon
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   635 72-79   Apr 2006
We have searched for Θ+ via π-p→K -X reaction using 1.87 and 1.92 GeV/c π- beam at the K2 beam line of the KEK 12 GeV proton synchrotron. In the missing mass spectrum at beam momentum of 1.92 GeV/c, a bump has been found at 1530 MeV/c2 which is co...
M. Ukai, S. Ajimura, H. Akikawa, D. E. Alburger, A. Banu, R. E. Chrien, G. B. Franklin, J. Franz, O. Hashimoto, T. Hayakawa, H. Hotchi, K. Imai, T. Kishimoto, M. May, D. J. Millener, S. Minami, Y. Miura, T. Miyoshi, K. Mizunuma, T. Nagae, S. N. Nakamura, K. Nakazawa, Y. Okayasu, P. Pile, B. P. Quinn, A. Rusek, Y. Sato, R. Sutter, H. Takahashi, L. Tang, H. Tamura, K. Tanida, L. Yuan, S. H. Zhou
Physical Review C - Nuclear Physics   73    Jan 2006
In a γ-ray spectroscopy experiment with the (K-,π-) reaction on a B10 target, we have observed the 7/2+→5/2+ spin-flip M1 transition in Λ7Li via γ-γ coincidence with the 5/2+→1/2+E2 transition. This is the first successful γ-γ coincidence measurem...
Yoshinori Sato, Keizo Agari, Erina Hirose, Masaharu Ieiri, Youichi Igarashi, Susumu Inaba, Yoji Katoh, Michifumi Minakawa, Hiroyuki Noumi, Masatoshi Saito, Yoshihiro Suzuki, Hitoshi Takahashi, Minoru Takasaki, Kazuhiro Tanaka, Akihisa Toyoda, Yoshikazu Yamada, Yutaka Yamanoi, Hiroaki Watanabe
IEEE Nuclear Science Symposium Conference Record   2 1043-1046   Dec 2005
Nondestructive beam profile monitor utilizing ionizations of residual gas has been developed for continuous monitoring of 3×1014protons at Japan Proton Accelerator Research Complex (J-PARC). Knock-on electrons produced in the ionizations of residu...
K. Agari, Y. Hayato, E. Hirose, A. Ichikawa, J. Imazato, T. Kobayashi, M. Minakawa, T. Nakadaira, K. Nishikawa, H. Noumi, T. Ooyabu, Y. Sato, Y. Suzuki, H. Takahashi, S. Ueda, Y. Yamanoi
Journal of Nuclear Materials   343 27-32   Aug 2005
At the Japan Proton Accelerator Research Complex (J-PARC), the world highest intensity secondary beams of kaons, pions, anti-protons, muons, and neutrinos will be produced by irradiating a target with the 50 GeV primary proton beam of 0.75 MW. Uti...
Shu Hua Zhou, Jing Zhou, Qiu Ying Meng, S. Ajimura, H. Akikawa, D. E. Alburger, A. Banu, R. E. Chrien, G. B. Franklin, J. Franz, O. Hashimoto, T. Hayakawa, H. Hotchi, K. Imai, T. Kishimoto, M. May, D. J. Millener, S. Minami, Y. Miura, T. Miyoshi, K. Mizunuma, T. Nagae, S. N. Nakamura, K. Nakazawa, Y. Okayasu, P. Pile, B. P. Quinn, A. Rusek, Y. Sato, R. Sutter, H. Takahashi, L. Tang, H. Tamura, K. Tanida, M. Ukai, L. Yuan
Kao Neng Wu Li Yu Ho Wu Li/High Energy Physics and Nuclear Physics   29 627-631   Jul 2005
In a Λ16 O γ-ray spectroscopy experiment with HYPERBALL, two γ-ray transitions from the 6.6MeV excited 1 2- state to both ground-states spin-doublet members 1 1- and 0 - have been observed. The measured ground-state doublet spacing is 26.4 ± 1.6(s...
K. Miwa, K. Tanida, H. Akikawa, Y. Fukao, E. Hiyama, H. Hotchi, K. Imai, Y. Miura, K. Mizunuma, S. N. Nakamura, M. Niiyama, S. Ota, P. K. Saha, H. Takahashi, T. Takahashi, H. Tamura, S. Terashima, M. Togawa, M. Ukai
Nuclear Physics A   754 80-85   May 2005
We performed an experiment to measure γ rays of hyperfragments produced by stopped K- reactions on light (A ≤ 12) targets (KEK-PS E509). We clearly observed an E2 transition (5/2+ → 1/2+) in Λ7Li with 10B, and 11B and 12C targets and obtained the ...
H. Tamura, S. Ajimura, H. Akikawa, D. E. Alburger, K. Aoki, A. Banu, R. E. Chrien, G. B. Franklin, J. Franz, Y. Fujii, Y. Fukao, T. Fukuda, O. Hashimoto, T. Hayakawa, E. Hiyama, H. Hotchi, K. Imai, W. Imoto, Y. Kakiguchi, M. Kameoka, T. Kishimoto, A. Krutenkova, T. Maruta, A. Matsumura, M. May, S. Minami, Y. Miura, K. Miwa, T. Miyoshi, K. Mizunuma, T. Nagae, S. N. Nakamura, K. Nakazawa, M. Niiyama, H. Nomura, H. Noumi, Y. Okayasu, S. Ota, T. Ohtaki, H. Outa, P. Pile, B. P. Quinn, A. Rusek, P. K. Saha, Y. Sato, T. Saitoh, M. Sekimoto, R. Sutter, H. Takahashi, T. Takahashi, L. Tang, K. Tanida, S. Terashima, M. Togawa, A. Toyoda, M. Ukai, H. Yamauchi, L. Yuan, S. H. Zhou
Nuclear Physics A   754 58-69   May 2005
The present status of hypernuclear γ-ray spectroscopy with Hyperball is summarized. We observed two γ transitions of Λ16O(1- → 1-, 0-) and obtained the strength of the ΛN tensor force. In 10B(K- π- γ) data, we did not observe the spin-flip M1 tran...
M. Ukai, O. Hashimoto, Y. Miura, T. Miyoshi, K. Mizunuma, S. N. Nakamura, Y. Okayasu, H. Tamura, S. Ajimura, T. Kishimoto, T. Hayakawa, S. Minami, H. Akikawa, K. Imai, H. Takahashi, D. E. Alburger, R. E. Chrien, H. Hotchi, M. May, P. Pile, A. Rusek, R. Sutter, T. Nagae, Y. Sato, A. Banu, G. B. Franklin, B. P. Quinn, J. Franz, K. Nakazawa, K. Tanida, L. Tang, L. Yuan
Nuclear Physics A   754 70-74   May 2005
We observed two γ-ray transitions of Λ16O in the 16O(K-, π- γ) reaction using a germanium detector array, Hyperball. The γ rays are assigned as the M1 transitions from the 6 MeV excited state (1-) to the ground state doublet (1-, 0-). The energies...
M. Ukai, S. Ajimura, H. Akikawa, D. E. Alburger, A. Banu, R. E. Chrien, G. B. Franklin, J. Franz, O. Hashimoto, T. Hayakawa, H. Hotchi, K. Imai, T. Kishimoto, M. May, D. J. Millener, S. Minami, Y. Miura, T. Miyoshi, K. Mizunuma, T. Nagae, S. N. Nakamura, K. Nakazawa, Y. Okayasu, P. Pile, B. P. Quinn, A. Rusek, Y. Sato, R. Sutter, H. Takahashi, L. Tang, H. Tamura, K. Tanida, L. Yuan, S. H. Zhou
Physical Review Letters   93    Dec 2004
The γ-ray transitions in λ16O from the 6.6 meV excited 12- state to both ground state spin-doublet members and λN tensor interaction were analyzed. It was observed that the ground state doublet spacing provides a small but nonzero strength of the ...
Erina Hirose, Kaguhiro H. Tanaka, Toshihiro Takahashi, Yutaka Sato, Keigo Agari, Masaharu Ieiri, Yohji Kato, Michifumi Minakawa, Hiroyuki Noumi, Yoshinori Sato, Yoshihiro Suzuki, Hitoshi Takahashi, Minoru Takasaki, Akihisa Toyoda, Yoshikagu Yamada, Yutaka Yamanoi
IEEE Transactions on Applied Superconductivity   14 1814-1817   Jun 2004
A new 3-axis magnetic field measurement system based on the Hall elements has been constructed at KEK. The new system was designed for the larger magnets of higher energy accelerator facilities such as J-PARC. We employed a 7 m long 2 m wide iron ...
K. H. Tanaka, E. Hirose, H. Takahashi, A. Agari, A. Toyoda, Y. Sato, M. Minakawa, H. Noumi, Y. Yamanoi, M. Ieiri, Y. Katoh, Y. Yamada, Y. Suzuki, M. Takasaki, T. Birumachi, S. Tsukada, Y. Saitoh, N. Saitoh, K. Yahata, K. Kato, H. Tanaka
IEEE Transactions on Applied Superconductivity   14 402-405   Jun 2004
A series of the R&D works on the radiation resistant magnets for the Japan Hadron Facility (JHF) project has been continued at the High Energy Accelerator Research Organization (KEK). The JHF is a high-energy part of the Japanese high intensity Pa...
Jyunkichi Asai, Tomokazu Fukuda, Masaharu Ieiri, Kenichi Imai, Wataru Imoto, Soma Iwata, Tetsuhito Kadowaki, Maki Kurosawa, Tomofumi Maruta, Tomofumi Nagae, Hiroyuki Noumi, Planab Kumar Saha, Akira Sato, Hitoshi Takahashi, Choong Jae Yoon, Kozi Nakai
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers   43 1586-1592   Jan 2004
A new tracking detector, scintillating track image camera (SCITIC) was used for hyperon-scattering experiments. Since the hyperon lifetimes are short, the low-energy hyperon-nucleon scattering can be studied only with a track detector used as an a...
H. Takahashi, J. K. Ahn, H. Akikawa, S. Aoki, K. Arai, S. Y. Bahk, K. M. Baik, B. Bassalleck, J. H. Chung, M. S. Chung, D. H. Davis, T. Fukuda, K. Hoshino, A. Ichikawa, M. Ieiri, K. Imai, Y. H. Iwata, Y. S. Iwata, H. Kanda, M. Kaneko, T. Kawai, M. Kawasaki, C. O. Kim, J. Y. Kim, S. J. Kim, S. H. Kim, Y. Kondo, T. Kouketsu, K. N. Kyaw, Y. L. Lee, J. W.C. McNabb, M. Mitsuhara, Y. Nagase, C. Nagoshi, K. Nakazawa, H. Noumi, S. Ogawa, H. Okabe, M. Okuda, K. Oyama, B. D. Park, H. M. Park, I. G. Park, J. Parker, Y. S. Ra, J. T. Rhee, A. Rusek, H. Shibuya, K. S. Sim, P. K. Saha, D. Seki, M. Sekimoto, J. S. Song, T. Takahashi, F. Takeutchi, H. Tanaka, K. Tanida, J. Tojo, H. Torii, S. Torikai, D. N. Tovee, N. Ushida, T. Wint, K. Yamamoto, N. Yasuda, J. T. Yang, C. J. Yoon, C. S. Yoon, M. Yosoi, T. Yoshida, L. Zhu
Nuclear Physics A   721    Jun 2003
A hybrid-emulsion experiment has been carried out at KEK-PS to study S = -2 nuclei. With the analysis of about 35% of total emulsion, we have successfully found three events of sequential weak decay of a double-hypernucleus. The results of these E...
K. Tanida, H. Akikawa, Y. Fukao, H. Hotchi, K. Imai, Y. Miura, K. Miwa, K. Mizunuma, S. N. Nakamura, M. Niiyama, S. Ohta, P. K. Saha, H. Takahashi, T. Takahashi, H. Tamura, S. Terashima, M. Togawa, M. Ukai
Nuclear Physics A   721    Jun 2003
We measured γ rays of hyperfragments produced by stopped K- reactions on light (A ≤ 12) targets (KEK-PS E509). By preliminary analysis, 2050 keV γ ray from Λ7Li(E2:5/2+ → 1/2+) is seen with 10B and C targets. Also, two candidates for new hypernucl...
H. Tamura, S. Ajimura, H. Akikawa, D. E. Alburger, A. Banu, R. E. Chrien, P. Eugenio, G. B. Franklin, J. Franz, L. Gan, O. Hashimoto, T. Hayakawa, H. Hotchi, K. Imai, T. Kishimoto, P. Khaustov, M. May, S. Minami, Y. Miura, T. Miyoshi, K. Mizunuma, T. Nagae, S. N. Nakamura, K. Nakazawa, Y. Okayasu, P. H. Pile, B. P. Quinn, A. Rusek, J. Sasao, Y. Sato, R. Sawafta, H. Schmitt, R. Sutter, H. Takahashi, L. Tang, K. Tanida, M. Ukai, L. Yuan, S. H. Zhou, L. H. Zhu, X. F. Zhu
Modern Physics Letters A   18 85-94   Feb 2003
High resolution γ spectroscopy of hypernuclei using Hyperball has revealed detailed level structure of several p-shell Λ hypernuclei and allowed us to extract the strengths of ΛN spin-dependent interactions. In the experiment BNL E930, we observed...
T. Kadowaki, J. Asai, W. Imoto, S. Iwata, M. Kurosawa, K. Nakai, A. Sato, K. Imai, H. Takahashi, C. J. Yoon, T. Maruta, M. Ieiri, T. Nagae, H. Noumi, T. Fukuda, P. K. Saha, B. Bassalleck
The European Physical Journal   15 295-298   Nov 2002
In order to study the hyperon-nucleon spin-orbit interaction, asymmetries of the polarized ∑+ elastic scattering on protons have been measured. The polarized hyperons were produced through the p(π+, K+)∑+ reaction in a liquid-scintillator active t...
H. Takahashi, H. Akikawa, S. Aoki, A. Ichikawa, M. Ieiri, K. Imai, H. Kanda, Y. Kondo, K. Nakazawa, J. T. Rhee, J. Tojo, K. Yamamoto, T. Yoshida
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   A483, pp.689 689-697   May 2002
Scintillating-fiber-block detectors have been constructed using 0.5 mm square fibers for the KEK-PS E373 experiment, which searches for double-strangeness nuclei. The main aim of the detector is to measure the energies of protons and pions produce...
H. Takahashi, J. K. Ahn, H. Akikawa, S. Aoki, K. Arai, S. Y. Bahk, K. M. Baik, B. Bassalleck, J. H. Chung, M. S. Chung, D. H. Davis, T. Fukuda, K. Hoshino, A. Ichikawa, M. Ieiri, K. Imai, Y. H. Iwata, Y. S. Iwata, H. Kanda, M. Kaneko, T. Kawai, M. Kawasaki, C. O. Kim, J. Y. Kim, S. J. Kim, S. H. Kim, Y. Kondo, T. Kouketsu, Y. L. Lee, J. W.C. McNabb, M. Mitsuhara, Y. Nagase, C. Nagoshi, K. Nakazawa, H. Noumi, S. Ogawa, H. Okabe, K. Oyama, H. M. Park, I. G. Park, J. Parker, Y. S. Ra, J. T. Rhee, A. Rusek, H. Shibuya, K. S. Sim, K. Saha, D. Seki, M. Sekimoto, J. S. Song, T. Takahashi, F. Takeutchi, H. Tanaka, K. Tanida, J. Tojo, H. Torii, S. Torikai, D. N. Tovee, N. Ushida, K. Yamamoto, N. Yasuda, J. T. Yang, C. J. Yoon, C. S. Yoon, M. Yosoi, T. Yoshida, L. Zhu
Physical Review Letters   87 2125021-2125025   Nov 2001
A hybrid-emulsion experiment was conducted to study a double-hyperfragment event and to calculate the binding energies of double hypernuclei. The 6λλHe hypernucleus constituting the lightest closed shell structure containing baryons was studied. T...
A. Ichikawa, J. K. Ahn, H. Akikawa, S. Aoki, K. Arai, S. Y. Bahk, K. M. Baik, B. Bassalleck, J. H. Chung, M. S. Chung, K. Hoshino, M. Ieiri, K. Imai, Y. H. Iwata, Y. S. Iwata, H. Kanda, M. Kaneko, T. Kawai, C. O. Kim, J. Y. Kim, S. J. Kim, S. H. Kim, Y. Kondo, T. Kouketsu, Y. L. Lee, J. W.C. McNabb, M. Mitsuhara, Y. Nagase, C. Nagoshi, K. Nakazawa, H. Noumi, S. Ogawa, H. Okabe, K. Oyama, H. M. Park, I. G. Park, J. Parker, Y. S. Ra, J. T. Rhee, A. Rusek, H. Shibuya, K. S. Sim, P. K. Saha, D. Seki, M. Sekimoto, J. S. Song, H. Takahashi, T. Takahashi, F. Takeutchi, H. Tanaka, K. Tanida, J. Tojo, H. Torii, S. Torikai, N. Ushida, K. Yamamoto, N. Yasuda, J. T. Yang, C. J. Yoon, C. S. Yoon, M. Yosoi, T. Yoshida, L. Zhu
Nuclear Physics A   691 246-249   Aug 2001
A. Ichikawa, J. K. Ahn, H. Akikawa, S. Aoki, K. Arai, S. Y. Bahk, K. M. Baik, B. Bassalleck, J. H. Chung, M. S. Chung, K. Hoshino, M. Ieiri, K. Imai, Y. H. Iwata, Y. S. Iwata, H. Kanda, M. Kaneko, T. Kawai, C. O. Kim, J. Y. Kim, S. J. Kim, S. H. Kim, Y. Kondo, T. Kouketsu, Y. L. Lee, J. W.C. McNabb, M. Mitsuhara, Y. Nagase, C. Nagoshi, K. Nakazawa, H. Noumi, S. Ogawa, H. Okabe, K. Oyama, H. M. Park, I. G. Park, J. Parker, Y. S. Ra, J. T. Rhee, A. Rusek, H. Shibuya, K. S. Sim, P. K. Saha, D. Seki, M. Sekimoto, J. S. Song, H. Takahashi, T. Takahashi, F. Takeutchi, H. Tanaka, K. Tanida, J. Tojo, H. Torii, S. Torikai, N. Ushida, K. Yamamoto, N. Yasuda, J. T. Yang, C. J. Yoon, C. S. Yoon, M. Yosoi, T. Yoshida, L. Zhu
Physics Letters   500 37-46   Feb 2001
A hybrid emulsion experiment was carried out to study double-strangeness nuclei produced via ξ- hyperon capture at rest with the expectation of ten times larger statistics than previous experiments. We have analyzed 5% of the total emulsion and fo...
H. Takahashi, J. K. Ahn, H. Akikawa, S. Aoki, K. Arai, S. Y. Bahk, K. M. Baik, B. Bassalleck, J. H. Chung, M. S. Chung, D. H. Davis, T. Fukuda, K. Hoshino, A. Ichikawa, M. Ieiri, K. Imai, Y. H. Iwata, Y. S. Iwata, H. Kanda, M. Kaneko, T. Kawai, M. Kawasaki, C. O. Kim, J. Y. Kim, S. J. Kim, S. H. Kim, Y. Kondo, T. Kouketsu, Y. Lee, J. W.C. Mc Nabb, M. Mitsuhara, Y. Nagase, C. Nagoshi, K. Nakazawa, H. Noumi, S. Ogawa, H. Okabe, K. Oyama, H. M. Park, I. G. Park, J. Parker, Y. S. Ra, J. T. Rhee, A. Rusek, H. Shibuya, K. S. Sim, P. K. Saha, D. Seki, M. Sekimoto, J. S. Song, T. Takahashi, F. Takeutchi, H. Tanaka, K. Tanida, J. Tojo, H. Torii, S. Torikai, D. N. Tovee, N. Ushida, K. Yamamoto, N. Yasuda, J. T. Yang, C. J. Yoon, C. S. Yoon, M. Yosoi, T. Yoshida, L. Zhu
Physical Review Letters   87 212502   Jan 2001
A double-hyperfragment event has been found in a hybrid-emulsion experiment. It is identified uniquely as the sequential decay of 6∧ ∧ He emitted from a hyperon nuclear capture at rest. The mas of 6∧∧ He and the ∧ − ∧ interaction energy ΔB∧ ∧ have...
Observation of a He6LL Double Hypernucleus
Physical Review Letters   87, 212502    2001
J. K. Ahn, Y. Akaishi, H. Akikawa, S. Aoki, S. Y. Bahk, K. M. Baik, M. S. Chung, T. Fukuda, K. Hoshino, A. Ichikawa, M. Ieiri, K. Imai, Y. Iwata, H. Kanda, M. Kaneko, T. Kawai, C. O. Kim, J. Y. Kim, S. J. Kim, Y. Kondo, T. Motoba, C. Nagoshi, K. Nakazawa, H. Noumi, S. Ogawa, H. Okabe, K. Oyama, H. M. Park, I. G. Park, Y. S. Ra, J. T. Rhee, M. Sekimoto, H. Shibuya, K. S. Sim, J. S. Song, H. Takahashi, T. Takahashi, F. Takeutchi, H. Tanaka, J. Tojo, H. Torii, S. Torikai, N. Ushida, K. Yamamoto, Y. Yamamoto, J. T. Yang, N. Yasuda, C. J. Yoon, T. Yoshida, Y. Yosoi
Nuclear Physics A   670    May 2000
An experiment to search for double-strangeness nuclei in nuclear emulsion is now being carried on as KEK-PS E373. Preliminary results of the data analysis for the K+ spectrometer and the scintillating fiber detectors are presented. Status of the a...

Research Grants & Projects

 
Study of double hypernuclei with hybrid-emulsion method
Cooperative Research
Project Year: 1997